Microchip Technology AT28C010E-12JU-235

Overview

AT28C010E-12JU-235 from Microchip Technology is a 1-Mbit (128K × 8) paged parallel EEPROM with 120 ns read access time, JEDEC-standard byte-wide pinout, and industrial temperature range (–40°C to +85°C). It features automatic 128-byte page write, hardware/software data protection, and single 5V ±10% supply - used in firmware storage, configuration memory, and boot code retention for embedded controllers.

For engineers reviewing the AT28C010E-12JU-235 datasheet, AT28C010E-12JU-235 pinout, AT28C010E-12JU-235 application, or AT28C010E-12JU-235 equivalent, key selection criteria include page write timing (≤10 ms), DATA Polling/Toggle Bit end-of-write detection, CMOS/TTL compatibility, 100,000-cycle endurance, and PLCC-32 packaging with green (Pb/Halide-free) compliance.

Technical Context

The AT28C010E-12JU-235 implements a paged write architecture with internal 128-byte address/data latches and an autonomous control timer. Its dual-line enable logic (CE/OE) enables bus contention avoidance in SRAM-like interface systems.

It supports three write modes: byte write, page write (1–128 bytes within 150 µs inter-byte window), and optional software chip erase. End-of-write detection is implemented via DATA Polling on I/O7 and Toggle Bit behavior on I/O6 - both usable without external timing components.

Key Specifications

Pinout & Package

AT28C010E-12JU-235 is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC) with JEDEC-standard byte-wide pinout. Pin 1 is NC (No Connect); A0–A16 provide 17-bit addressing; I/O0–I/O7 serve bidirectional data transfer; CE, OE, and WE control device selection, output enable, and write initiation respectively.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar paged parallel EEPROM applications.

Compared with AT28C010-12JU and MN63F1000BTP, the AT28C010E-12JU-235 uniquely combines extended endurance, PLCC-32 compatibility, and zero-VPP 5V-only operation - making it optimal for retrofitting legacy industrial boards requiring long-term field reliability without hardware changes.

Availability

AT28C010E-12JU-235 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, telecom base stations, and automotive body control modules requiring stable component supply and long-lifecycle support.

Supply support for AT28C010E-12JU-235 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions with ISO 9001-certified operations and global distribution.

The AT28C010E-12JU-235 belongs to Microchip's legacy parallel EEPROM product line, engineered for drop-in replacement of obsolete EPROMs and early-generation flash in mission-critical industrial and automotive systems.

FAQ

What is the maximum page write size supported by the AT28C010E-12JU-235?

The AT28C010E-12JU-235 supports a maximum page write size of 128 bytes per internal programming cycle. This is enabled by its internal 128-byte address/data latch and requires all bytes to reside on the same page (defined by A7–A16). The AT28C010E-12JU-235 enforces a 150 µs inter-byte load window (tBLC); exceeding this triggers automatic write initiation. No external buffering or timing circuitry is needed.

Does the AT28C010E-12JU-235 require a 12V VPP supply for programming?

No, the AT28C010E-12JU-235 operates with a single 5V ±10% supply for both read and write functions. Unlike older EPROMs, it does not require a 12V VPP pin - all programming is performed at VCC level. The 12V specification referenced in the datasheet applies only to optional device identification memory (A9 = 12V) and is not used for standard write operations of the main array. The AT28C010E-12JU-235 simplifies power design by eliminating high-voltage generation.

How does hardware write protection work on the AT28C010E-12JU-235?

The AT28C010E-12JU-235 implements four hardware write protection mechanisms: (1) VCC sense that inhibits writes below ~3.8V, (2) 5 ms internal power-on delay before write enable, (3) requirement that CE, OE, and WE be in valid logic states (CE low, OE high, WE low) simultaneously, and (4) 15 ns noise filter on WE/CE inputs. These features collectively prevent spurious writes during power-up, brown-out, or EMI events - ensuring data integrity without firmware intervention. The AT28C010E-12JU-235 maintains this protection across all operating temperatures.

Can the AT28C010E-12JU-235 be used as a direct replacement for the AT28C010-12JU?

Yes, the AT28C010E-12JU-235 is pin-, package-, and timing-compatible with the AT28C010-12JU, differing only in endurance rating (100,000 vs. 10,000 cycles) and marking. All AC/DC electrical characteristics, pinout, instruction set, and software algorithms (including SDP enable/disable) are identical. No PCB or firmware changes are required when upgrading to the AT28C010E-12JU-235 - it delivers enhanced reliability while maintaining full backward compatibility.

What is the purpose of the "E" suffix in AT28C010E-12JU-235?

Within the AT28C010E-12JU-235 part number, the "E" denotes Extended Endurance - specifying 100,000 write/erase cycles instead of the standard 10,000 cycles. This is a factory-programmed characteristic verified during wafer sort and final test. The "E" does not affect speed grade (12 = 120 ns), package (J = PLCC-32), temperature grade (U = industrial), or any other functional parameter. The AT28C010E-12JU-235 maintains identical timing, voltage, and interface behavior to non-E variants.